20 C. E. SIEBENTHAL 
The Blanca glaciers lie snugly under the steep north face of Blanca 
Peak as will be seen in Fig. 4, taken from a point about a half-mile 
north of McMillan’s mine, which appears in the foreground. The 
glacier on the left, mostly covered with fresh snow, is the smaller. 
The surface of this glacier shows many small longitudinal gullies and 
another system running transversely. These seem to be largely due to 
Fic. 4.—Blanca glaciers from the northeast. 
original wind ripple-marks in the snow into which dust has settled, 
melting them deeper. 
The north glacier, the one on the right, is shown in a nearer view 
(Fig. 5), taken from the moraine immediately below it with the camera 
tilted upward somewhat. Figure 6 is a view northward across the same 
glacier from a point near the southern one. ‘These two views display 
the glacier very well. The width of the glacier is about 800 feet, 
and its greatest length is about 1,000 feet, although the ice probably 
extends a considerable distance farther beneath the terminal moraine. 
The glacier lies in a pocket on the mountain side, and the ice is prob- 
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